Senior Leadership

Meet our Senior Leadership team at Minnesota Gastroenterology, P.A.  This team leads and works alongside our Board of Directors, providers and the rest of our staff to ensure that Minnesota Gastroenterology is a nationally recognized leader in the diagnosis and treatment of adults and children with GI disorders.

President and CEO

Dr. Ketover is Minnesota Gastroenterology’s President and CEO.  He has been a member of the Board of Directors since 1998, has served as Chairman of the Board since 2007, and has held a number of other leadership positions within the organization. 


Dr. Leon is the Chair of the Finance Committee and has been a member of the Board of Directors since 2002. He served as President and Chairman of the Board from 1999 to 2004. Dr. Leon is currently a member of the Colonoscopy Study Group, the Physician Recruiting Committee and the Esophageal Subspecialty Committee.

Chief Performance Officer

Ms. Brock has led the Minnesota Gastroenterology human resources (HR) department since 1999. The HR department is responsible for recruitment, payroll, benefits, employee relations, workers' compensation, training and education, credentialing and peer review. 

Ms. Brock holds a master's degree in clinical psychology from Pepperdine University in Los Angeles and is certified as a Senior Professional in Human Resources (SPHR) and a Certified Medical Practice Executive (CMPE). She has participated in state and national human resources leadership activities.

Chief Information Officer

Ms. Lang leads the Minnesota Gastroenterology information services (IS) team, which includes network services, software integration and support services. The IS department provides support and maintenance services to seven locations with 450 users, 55 network servers, more than 600 devices and 30 applications. The department also provides electronic medical record and application development as well as financial and clinical data mining.

Chief Operations Officer

As Chief Operations Officer, Tracy Mill’s role includes leadership of Minnesota Gastroenterology’s clinical operations, ancillary service lines, and ancillary support services; which include a team of 13 Directors. Tracy is passionate about delivering quality healthcare and excellent customer service and has devoted 19 years of her career at Minnesota Gastroenterology (MNGI) leading initiatives and building an operations infrastructure to support patients, referring physicians, and hospital partners.

Chief Financial Officer

Mr. Silvernale has been responsible for the finance, accounting and business office functions at Minnesota Gastroenterology, P.A. since 1998.  With more than 20 years of health finance experience, he is able to offer local and national perspectives on physician ownership structures, compensation formulas and financial reporting.